Burghul Plant Extract as a Green Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid Solution

Abstract

Carbon steel is very important because it is widely used in many industrial and engineering fields, such as oil and gas. However, engineering materials accounted for 85% of yearly steel production due to their accessibility and affordability. As a result of strict environmental rules and a growing ecological consciousness among scientists, "green" ways to minimize corrosion have been created. In the current study, burghul extract is demonstrated to be an effective corrosion inhibitor and was utilized as an environmentally acceptable anti-corrosive material for carbon steel in a 1M HCl solution. The effectiveness of mitigation methods such as mass loss, electrochemical impedance spectroscopy, frequency modulation, and potentiodynamic polarization (PP) was calculated. Meanwhile, dispersion X-ray (EDX) and scanning electron microscopy (SEM) methods were used to analyze surfaces. Results obtained showed that temperature and extract concentration both affect how effective the mitigation is. The inhibition is attributed to the development of a protective layer that slows the dissolution of carbon steel at its surface. The Langmuir model was validated by the adsorption of burghul extract on steel. The adsorption of the extract affected both anodic and cathodic reactions. Tafel curves showed that burghul is a mixed inhibitor. The Nyquist curves confirmed that the burghul extract prevents the disintegration of steel in acidic media without changing the dissolution reaction mechanism. By using ATR-FTIR analysis and SEM inspection, the burghul extract's adsorption on the metal carbon steel was verified. A maximum inhibitory efficacy of 95% was reached at 313 K using 300 ppm of the Burghul extract, which is thought to be a promising result.